The investigators propose to use a weight-based regimen consisting of basal-bolus insulin and preprandial rapid-acting insulin and to test its efficacy and safety in controlling blood glucose in hospitalized patients with type 2 diabetes.

Patients with type 2 diabetes are randomly assigned by computer-generated block randomization to receive either weight-based or glucose level-based titration regimen. All antidiabetic drugs are discontinued on admission.

Starting dose:

Total daily insulin is 0.4U/kg. Half is given as glargine and the remainder as aspart which is divided into three equal parts used for three pre-meal boluses.

Titration:

1. Weight-based insulin titration regimen:

   Glargine titration: 0.1U/kg per day when fasting blood glucose (FBG) is over 8.0 mmol/L.

   Aspart titration: total dose 0.1U/kg per day when next pre-meal blood glucose (BG) is over 8.0 mmol/L, which is divided into three equal parts adding to three pre-meal boluses.

2. Glucose level- based titration regimen:

Glargine titration: 4, 6, or 8 U when FBG is, respectively, within the following ranges: 8.0-8.9, 9.0-9.9, >10.0 mmol/L.

Aspart titration: 1, 3, 5, 7 or 8 U when next pre-meal BG is, respectively, within the following ranges: 8.0-10.9, 11.0-13.9, 14.0-16.9, 17.0-19.9, > 20 mmol/L.

Inclusion Criteria:

• Patients aged 18 to 80 years with type 2 diabetes admitted to Endocrinology wards.

Exclusion Criteria:

• Patients with hepatic or renal dysfunction, cancer, or diabetic ketoacidosis;
• Patients who are pregnant or lactating.